WOODWARD | 8273-128 Digital Load Sharing and Speed Control

Description

📊 Product Technical Parameters

• Brand: WOODWARD
• Model: 8273-128 (2301D-ST)
• Series: 2301D-ST (Steam Turbine Control Series)
• Product Name: Digital Load Sharing and Speed Control Module
• Country of Origin: USA
• Condition Status: Brand New / Industrial Factory Original In-Stock
• Dimensions: 26.0 cm x 24.8 cm x 2.5 cm (approx. 10.24 in x 9.76 in x 0.98 in)
• Weight: 0.9 kg (approx. 2.0 lbs)
• Original Region: United States
• Power Supply / Rating: 24 VDC (18 to 40 VDC nominal, power consumption \le 20 W)

⚙️ Operation Specifications and Usage Methods

• Installation Preparation: Ensure the control cabinet is completely powered off before mounting the module onto a standard panel via embedded installation. Verify all terminal wiring for the magnetic pickup (MPU), actuator output, and communication lines.
• Parameter Configuration: Use a computer connected through the 9-pin RS-232 communication port running specialized Woodward configuration software to set rated speed, gear teeth, and PID dynamics.
• Operational Control: Monitor real-time load distribution and speed regulation parameters via the analog and digital I/O channels to ensure seamless multi-unit parallel generator or single-valve steam turbine operation.

⚡ Startup and Shutdown Sequence

• Startup Sequence:
  1. Turn on auxiliary control power and verify that the 24 VDC supply to the module is stable without error codes.
  2. Initiate the prime mover auxiliary systems (such as lube oil pumps) and confirm pre-lubrication is complete.
  3. Release emergency stops and issue the start command through the discrete inputs or communication interface; allow the unit to ramp up smoothly to idle speed.
  4. Perform synchronization checks and close the generator circuit breaker once parallel conditions are met to begin load sharing.
• Shutdown Sequence:
  1. Gradually unload the generator using remote control or software ramp commands until active power nears zero.
  2. Open the generator circuit breaker to disconnect the unit from the electrical bus.
  3. Issue the shutdown command to allow the turbine or engine to cool down according to mechanical specifications.
  4. Cut off the main fuel or steam supply, and finally power down the 24 VDC control system power supply after complete standstill.

💡 Product Description

The Woodward 8273-128 is an advanced digital load sharing and speed control module specifically engineered for industrial prime movers, notably single-valve steam turbines and diesel/gas generator parallel systems. It provides precise closed-loop PID speed regulation, flexible droop and isochronous load balancing, and robust anti-interference performance built for harsh industrial environments.

❓ Frequently Asked Questions (Q&A)

• Q: What should I do if the module fails to communicate through the RS-232 port?
  • A: Check if the baud rate matches your configuration software settings (typically between 1200 and 38,400 baud) and ensure the physical serial cable is securely plugged into the 9-pin connector.
• Q: Can this controller handle sudden load rejection events?
  • A: Yes, it features integrated dynamic compensation and internal limiters designed to suppress speed overshoots and protect against sudden load fluctuations.
• Q: Is recalibration required when replacing an actuator?
  • A: Yes, you should reconfigure and calibrate the actuator output span (4-20 mA or 20-200 mA) using the software tool to match the new valve or actuator response characteristics.